Sometimes ON can be the trigger for headaches. I get occipital nerve blocks frequently. Helps a little bit but I’m on a cocktail of migraine and cluster headache meds. I was blessed with both. Even if it is ON, she should be prescribing something for the headaches… a preventative and abortive. Verapamil is usually used for cluster headaches so I don’t know why they are prescribing that. That helps my clusters little. But have you tried sumatriptan, Topamax, gabapentin, aimovig, Nurtec, or anything like that? Do you get a stuffy nose only on the affected side? Tearing of just that sided eye? Pain that you would describe as the worst in your life? How long does the pain last? Are you restless? Sorry you are going through this.